3D printing material and preparation method and application thereof

• Main Authors: TAN HONGSHENG, BI XIANGJUN, LIU ZHITAO, WEI ANSHENG
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2018
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a 3D printing material and a preparation method and application thereof. The printing material comprises a plurality of modified chopped fibers and a component at least comprising thermoplastic resin, wherein the end face of any one modified chopped fiber is grafted with an active group, and other parts of the any one modified chopped fiber except for the end face are all coated with inert resin; and the inert resin does not react with the active groups. According to the printing material provided by the invention, the concept of reaction connection of the modified chopped fibers, i.e., reinforced item segments, is brought into a continuous fiber reinforced thermoplastic material, so that not only can the advantages of continuous fibers in the 3D printing be achieved, but also printing forming of a hollow-out structure or a spacial stereoscopic structure can be implemented on the basis of keeping the advantages. 本发明提供了种3D打印材料及其制备方法和应用，该打印材料包括若干改性短切纤维和至少包含热塑性树脂的组分，其中，任意所述改性短切纤维的端面均接枝有活性基